CN112368921A

CN112368921A - Resolver device and rotating electrical machine with resolver device

Info

Publication number: CN112368921A
Application number: CN201880095147.XA
Authority: CN
Inventors: 君岛启
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2018-07-03
Filing date: 2018-07-03
Publication date: 2021-02-12
Anticipated expiration: 2038-07-03
Also published as: EP3820027A1; WO2020008516A1; EP3820027A4; US20210211021A1; JPWO2020008516A1; US11552534B2; CN112368921B

Abstract

The purpose of the present invention is to improve the angle detection accuracy, wherein when the number of times of excitation of an excitation winding (10e) during one revolution of a resolver rotor (2), i.e., the number of times of excitation, is 2, the number of times of generation of an output signal for one revolution of the resolver rotor, i.e., an axial double angle is 5, and the number of resolver teeth (3T) is 8, the number of inner diameter deformation portions, i.e., the number of inner diameter deformation times, generated by fixing the resolver stator (3) to a fixed portion in the circumferential direction of a resolver device mounting portion (100Hh) is any one of 4 times, 6 times, 7 times, 8 times, and 9 times, when the number of times of excitation is 5, the axial double angle is 4, and the number of resolver teeth is 10, the number of inner diameter deformation times is any one of 3 times, 5 times, 7 times, 9 times, and 10 times, and when the number of excitation times is 3, When the shaft double angle is 4 and the number of resolver teeth is 12, the resolver stator is fixed to the resolver device mounting portion by the number of fixed portions corresponding to the number of inner diameter deformation times, where the inner diameter deformation times is set to any one of 2 times, 3 times, 5 times, 6 times, 7 times, 9 times, 10 times, 11 times, and 12 times.

Description

Resolver device and rotating electrical machine with resolver device

Technical Field

The present invention relates to a resolver device and a rotating electrical machine with the resolver device, and more particularly to a mounting structure of the resolver device to a mounting portion.

Background

For example, a conventional resolver device includes a fixing member that supports an outer periphery of a resolver stator to secure mounting accuracy, positions the fixing member by a concave portion of the stator and a convex portion of the fixing member, fixes the fixing member to a motor case with a bolt, arranges a shield member on the outer periphery to improve detection accuracy, and fixes the fixing member via the shield member when the resolver device is mounted.

Patent document 1: japanese patent No. 5728704

Patent document 2: japanese patent No. 4558036

Disclosure of Invention

Technical problem to be solved by the invention

In the conventional mounting structure of the resolver device disclosed in patent document 1, there is a possibility that a twist may be generated in the stator for winding the winding for mounting, and as a result, there is a possibility that the accuracy of the detection angle cannot be improved. In patent document 2, a member is added to reduce the distortion, but considering the strength of the thin shield plate and the thick stator, it cannot be considered that the reduction of the distortion is effective, and it is necessary to further suppress the influence of the distortion.

The present application discloses a technique obtained in view of the above-described actual situation, and aims to improve the accuracy of the detected angle.

Technical scheme for solving technical problem

The disclosed resolver device includes: a resolver stator having a resolver tooth portion around which an excitation winding and an output winding are wound; and a resolver rotor which is surrounded by the resolver stator and rotates via a rotation shaft, the resolver stator being fixed to the resolver device mounting portion at two or more places,

setting an inner diameter deformation frequency, which is the number of inner diameter deformation portions of the resolver stator generated by a fixed portion of the resolver stator fixed to a circumferential direction of the resolver device mounting portion, to any one of 4 times, 6 times, 7 times, 8 times, and 9 times, when an excitation frequency, which is the number of times the excitation winding is excited during one rotation of the resolver rotor, is 2, an axis double angle, which is the number of times an output signal is generated for one rotation of the resolver rotor, is 5, and the number of resolver teeth is 8,

when the number of times of excitation is 5, the shaft double angle is 4, and the number of resolver teeth is 10, the number of times of inner diameter deformation is any one of 3 times, 5 times, 7 times, 9 times, and 10 times,

when the number of times of excitation is 3, the shaft double angle is 4, and the number of resolver teeth is 12, the number of times of inner diameter deformation is any one of 2 times, 3 times, 5 times, 6 times, 7 times, 9 times, 10 times, 11 times, and 12 times,

and fixing the resolver stator to the resolver device mounting portion in a number of fixed portions corresponding to the number of times of the deformation of the one inner diameter.

Effects of the invention

According to the resolver device disclosed in the present application, distortion of a detection waveform due to distortion of a stator when the resolver device is mounted can be reduced, and angle detection accuracy can be improved.

Drawings

Fig. 1 is a diagram showing embodiment 1 of the present application, and is a schematic configuration diagram showing a part of an example of a rotating electric machine with a resolver device in a sectional view.

Fig. 2 is a diagram showing embodiment 1 of the present application, and is a front view showing an example of a resolver device to which the technology of the present application can be applied.

Fig. 3 is a diagram showing embodiment 1 of the present application, and is a side view of the resolver device illustrated in fig. 2.

Fig. 4A is a diagram showing embodiment 1 of the present application, and is a schematic diagram of a resolver device including an excitation winding and an output winding (sin winding & cos winding).

Fig. 4B is a diagram showing embodiment 1 of the present application, and illustrates an excitation waveform of a resolver excitation winding, an output waveform of a resolver output sin winding, and an output waveform of a resolver output cos winding, which are excited by the excitation power supply in the schematic diagram of fig. 4A.

Fig. 5 is a front view showing embodiment 1 of the present application, which is an example of an attachment structure for reducing distortion of a detected waveform while suppressing distortion of a stator when a resolver device is attached to an attachment portion, and is a diagram showing specific example 1 in which the number of times of excitation is set to 2, an axis double angle is set to 5, the number of resolver teeth is set to 8, and the number of times of inner diameter deformation is set to 4.

Fig. 6 is a diagram showing embodiment 1 of the present application, and is a front view showing example 2 of the resolver device in which the number of times of inner diameter deformation is changed from 4 to 6 with respect to fig. 5 (example 1).

Fig. 7 is a diagram showing embodiment 1 of the present application, and is a front view showing example 3 of the resolver device in which the number of times of excitation is changed from 2 to 5, the axial double angle is changed from 5 to 4, the number of resolver teeth is changed from 8 to 10, and the number of times of inner diameter deformation is further set to 3, with respect to fig. 5 (embodiment 1).

Fig. 8 is a diagram showing embodiment 1 of the present application, and is a front view showing example 4 of a resolver device in which the number of times of inner diameter deformation is changed from 3 to 5 with respect to fig. 7 (example 3).

Fig. 9 is a diagram showing embodiment 1 of the present application, and is a rear view showing example 5 of the resolver device in which the number of times of excitation is changed from 5 to 3, the number of resolver teeth is changed from 10 to 12, and the number of times of inner diameter deformation is further set to 7, with respect to fig. 7 (example 3).

Fig. 10 is a diagram showing embodiment 1 of the present application, and is a rear view showing example 6 of the resolver device in which the number of times of inner diameter deformation is changed from 7 to 9 with respect to fig. 9 (example 5).

Fig. 11A is a diagram showing embodiment 1 of the present application, and is a diagram showing the angle detection accuracy for each number of inner diameter deformations when the number of excitations is 2, the shaft multiple angle is 5, and the number of resolver teeth is 8.

Fig. 11B is a diagram showing embodiment 1 of the present application, and is a diagram showing the angle detection accuracy for each number of inner diameter deformations when the number of excitations is 5, the shaft multiple angle is 4, and the number of resolver teeth is 10.

Fig. 11C is a diagram showing embodiment 1 of the present application, and is a diagram showing the angle detection accuracy for each number of inner diameter deformations when the number of excitations is 3, the shaft multiple angle is 4, and the number of resolver teeth is 12.

Fig. 12 is a front view showing embodiment 2 of the present application, and shows another example of a mounting structure for reducing distortion of a detected waveform by suppressing distortion of a stator when a resolver device is mounted to a mounting portion.

Fig. 13 is a front view showing embodiment 3 of the present application, and shows another example of a mounting structure for reducing distortion of a detected waveform by suppressing distortion of a stator when a resolver device is mounted to a mounting portion.

Detailed Description

Embodiment 1.

Embodiment 1 of the present application will be described below with reference to fig. 1 to 11C.

As shown in the drawings, fig. 1 to 11C illustrate a resolver device 1, a permanent magnet resolver rotor 2, a resolver

stator

3, 8 resolver teeth 3T, a resolver tooth center line 3Tc, a resolver spool 4, a resolver winding 5, a resolver winding end 6, a resolver terminal 7, a resolver terminal block 8, a resolver air gap 9, a resolver excitation winding 10e, a resolver output sin winding 10s, a resolver output cos winding 10C, a resolver excitation waveform 11e, a resolver output sin waveform 11s, a resolver output cos waveform 11C, resolver caulking (caulking)

parts

12a, 12b, 12C, 12d, 12e, 12f, 12g, 12h, 12i,

resolver protrusions

13a, 13b, 13C, and, 13d, 13e, 13f, 12g, 13H, 13i, the rotating electrical machine 100, a housing 100H of the rotating electrical machine, a resolver device housing 100Hh as a resolver device mounting portion for the resolver device of the housing, a rotor 100R of the rotating electrical machine, a rotating shaft 100Rs of the rotating electrical machine, a stator 100S of the rotating electrical machine, and a stator coil 100Sc of the rotating electrical machine.

A schematic diagram of the resolver device is illustrated in fig. 4A, and a resolver excitation waveform 11e of a resolver excitation winding 10e excited by the excitation power source, a resolver output sin waveform 11s of a resolver output sin winding 10s, and a resolver output cos waveform 11c of a resolver output cos winding 10c in fig. 4A are illustrated in fig. 4B, but the contents illustrated in fig. 4A and 4B are well known, and thus detailed descriptions thereof are omitted.

Here, first, before embodiment 1 of the present application is specifically described with reference to the drawings, the axial multiple angle will be described in a simple manner.

In the resolver device 1, the resolver winding 5 is wound around a resolver tooth 3T provided in the resolver stator 3. Three types of coils, that is, an excitation winding 10e generating an excitation waveform 11e, a sin winding 10s generating a sin waveform 11s as a resolver output signal, and a cos winding 10c generating a cos waveform 11c as a resolver output signal, are wound as the resolver winding 5. The resolver rotor 2 is mounted to a rotating shaft 100Rs of the rotating electrical machine at a central hole of the resolver stator 3. The rotation angle is detected from the positional relationship between the sin waveform 11s and the cos waveform 11c depending on the excitation waveform 11e in accordance with the rotation of the resolver rotor 2 by the permanent magnet due to the irregularities (see the irregularities shown) on the outer peripheral surface of the resolver rotor 2. A type of generating an output signal corresponding to one rotation in one rotation of the resolver rotor 2 is referred to as 1X, a type of generating an output signal corresponding to two rotations in one rotation is referred to as 2X, a type of generating an output signal corresponding to four rotations is referred to as 4X, and these 1X, 2X, and 4X are referred to as axial double angles. That is, the number of times of generation of the output signal for one rotation of the resolver rotor 2 is referred to as an axis multiple angle. The shaft double angle is mostly determined by the pole pair angle of the motor.

Next, the number of times of one-rotation excitation of the resolver rotor 2 for the excitation winding is referred to as the number of times of excitation. That is, the number of times the resolver excitation winding 10e is excited during one rotation of the resolver 2 is referred to as the excitation number. The number of times of excitation is determined by the specification of the output winding in accordance with the shaft multiple angle and the number of resolver teeth 3T.

Further, fixing a part of the resolver 3 in the resolver device 1 at the same time at several places when fixing the resolver device 1 to the resolver device mounting portion is referred to as the number of times of inside diameter deformation. For example, when the stator is fixed at two positions, it is considered that the resolver stator 3 is microscopically distorted at the two fixed positions, and the inner diameter distortion of the resolver stator 3 is elliptical. In this case, the inner diameter deformation of the resolver stator 3 is referred to as inner diameter deformation 2 times. In addition, the inner diameter deformation in the case of fixing five points is referred to as inner diameter deformation 5 times.

In the resolver device 1 according to embodiment 1, in the case of the example shown in fig. 2 and 3, the resolver rotor 2 has 5 concave-convex portions on the outer periphery as shown in the drawing, and the axial multiple angle is 5X.

In the rotating electric machine 100, the 10-pole 12-slot structure has 5-pole diagonal corners. That is, the axial multiple angle (5X) of the resolver device 1 is the same as the magnet counter pole (5 pole diagonal angle) of the rotating electrical machine 100.

The resolver device 1 mainly includes a resolver stator 3 formed by laminating a plurality of thin steel plates, a resolver winding 5, and a resolver bobbin 4 for winding the resolver winding 5.

As illustrated in fig. 2, the resolver teeth 3T are arranged in the resolver stator 3 so as to extend in the radial direction at eight positions. The eight resolver teeth 3T are arranged at equal intervals in the circumferential direction.

In the resolver winding, 3 coils in total are wound with an excitation winding 10e, a sin winding 10s, and a cos winding 10c, which are respectively wound around the resolver teeth 3T, the resolver output winding, and the resolver winding, and 6 resolver winding ends 6 in total, which are the start and end of winding of each coil, extend to the left in fig. 2 and are connected to the corresponding resolver terminals 7. The above is the same structure as the conventional device.

When an excitation ac current is caused to flow through the excitation winding 10e of the resolver stator 3 while the resolver rotor 2 is rotating, resolver output waveforms that are sin waveform 11s and cos waveform 11c change in accordance with a change in the magnetic flux of the resolver air gap 9 between the resolver rotor 2 and the resolver teeth 3T. Further, the resolver output waveform contains an order component.

The order component is determined by the shaft multiple angle, the number of times of excitation, the number of resolver teeth, and the number of inner diameter deformation times, which are determined by the resolver (rotating electrical machine) specifications, and the number of inner diameter deformation times is determined by the number of fixed portions in the circumferential direction of the resolver stator 3.

Next, in the case of fixing the resolver device 1 to the resolver device housing portion (resolver device mounting portion) 100Hh of the casing 100H of the rotating electric machine 100, the fixation is performed by a fixing method such as a screw or caulking (caulking), but there is a possibility that a distortion may occur on the inner diameter side of the resolver stator 3 by the fixation, and there is a possibility that the inner diameter portion of the resolver stator 3 may be deformed due to the distortion. For example, if the resolver stator 3 is fixed to the resolver device mounting portion 100Hh at two circumferential fixing points, the radially inner deformed portion is referred to as being deformed 2 times because the radially inner deformed portion is at two circumferential fixing points, and the radially inner deformed portion is referred to as being deformed 3 times when the fixing points are at three circumferential fixing points.

As a result of qualitative analysis based on experiments and simulations, the robustness of the rotation angle detection with respect to the number of times of inner diameter deformation of the resolver stator 3, which is the number of inner diameter deformation portions of the resolver 3 generated by fixing the resolver stator 3 to the fixed portions in the circumferential direction of the resolver device mounting portion 100Hh, is derived.

When the number of times of excitation (the number of times of excitation of the resolver excitation winding 10e during one rotation of the resolver rotor 2) is 2, the shaft multiple angle (the number of times of generation of the output signal for one rotation of the resolver rotor 2) is 5, and the number of resolver teeth 3T is 8, the number of times of inner diameter deformation (the number of times of inner diameter deformation based on the number of inner diameter deformation portions generated by the fixing portion of the resolver stator 3 to the resolver device mounting portion 100Hh in the circumferential direction), as shown in fig. 11A, is set to any one of 4 times, 6 times, 7 times, 8 times, and 9 times,

when the number of times of excitation is 5, the shaft double angle is 4, and the number of resolver teeth is 10, the number of times of inner diameter deformation is any one of 3 times, 5 times, 7 times, 9 times, and 10 times as shown in fig. 11B,

when the number of times of excitation is 3, the shaft double angle is 4, and the number of resolver teeth is 12, the number of times of inner diameter deformation is any one of 2 times, 3 times, 5 times, 6 times, 7 times, 9 times, 10 times, 11 times, and 12 times as shown in fig. 11C,

in the above case, deterioration of the accuracy of the angle error can be suppressed, and the detected angle can be obtained with high accuracy even when the stator is distorted the above number of times.

As shown in fig. 11A, 11B, and 11C, the detection angle cannot be obtained with high accuracy for the number of times other than the number of times of the inner diameter deformation.

Embodiment 1 of the present application is an example of a case where the resolver device mounting portion is fixed by caulking (caulking), and as specific configuration examples, embodiment 1 is illustrated in fig. 5, embodiment 2 is illustrated in fig. 6, embodiment 3 is illustrated in fig. 7, embodiment 4 is illustrated in fig. 8, embodiment 5 is illustrated in fig. 9, and embodiment 6 is illustrated in fig. 10, respectively.

Embodiments

2, 3, 4, 5, and 6 illustrate an embodiment of another combination of the number of times of excitation, the shaft multiple angle, the number of teeth, and the number of times of inner diameter deformation in embodiment 1.

[ example 1]

Fig. 5 illustrates a case where the number of portions (corresponding to the number of times of inner diameter deformation) of the resolver stator 3 fixed to the resolver device mounting portion is selected to be 4 (4) in example 1 based on fig. 2.

Fig. 5 is a front view showing an example of a specific mounting structure for suppressing distortion of a stator and reducing distortion of a detected waveform when the resolver device is mounted to a mounting portion, and is a diagram showing a specific example in which the number of times of excitation is set to 2, the shaft multiple angle is set to 5, the number of resolver teeth is set to 8, and the number of times of inner diameter deformation is set to 4.

At 4 of the outer periphery of the resolver stator 3,

resolver caulking portions

12a, 12b, 12c, and 12d are applied at equal intervals in the circumferential direction of the resolver stator 3 by caulking (caulking), and are affected by this, and as schematically illustrated by dashed

resolver protrusions

13a, 13b, 13c, and 13d, a part of the outer periphery of the resolver stator 3 protrudes in correspondence with the

resolver caulking portions

12a, 12b, 12c, and 12d, and these

resolver protrusions

13a, 13b, 13c, and 13d are fixed tightly to the inner peripheral surface of a resolver device mounting portion (for example, the resolver device housing portion 100Hh in fig. 1) or the like.

Therefore, the detection waveform can be fixed without an additional component for mounting, and can be output more accurately.

It is also considered that the caulking (caulking) also causes a distortion (not shown) in the inner diameter direction of the resolver stator 3. Here, although there is a position of caulking (caulking) in the vicinity of the root (outer diameter direction) of the resolver teeth 3T, considering the magnetic path, the magnetic path is separated in two directions along the outer periphery at the root of the resolver teeth 3T, so that the case where the caulking portion is located on the center line 3Tc of the resolver teeth 3T in advance has little influence on the deformation of the resolver 3 due to caulking, and it is further desirable to apply the caulking portion to another resolver stator outer peripheral position. That is, it is desirable that at least one of the plurality of portions where the resolver device 1 is fixed to the resolver device mounting portion is arranged on the center line 3Tc of the resolver tooth portion 3T.

If the magnetic paths on the outer periphery of the resolver stator 3 are not saturated due to the sizes of the

resolver spline portions

12a, 12b, 12c, and 12d themselves in the circumferential direction of the resolver teeth 3T, the resolver spline portions may not be located on the center line 3Tc of the resolver teeth 3T. Further, the resolver stator 3 may be fixed to a resolver device mounting portion such as the resolver device housing portion 100Hh of the housing by providing a flange on the resolver 3 and forming a hole in the center thereof and tightening a screw. As described above, the position of the fixing portion for fixing the resolver device to the resolver device mounting portion is determined in the vicinity of the outer periphery of the resolver stator in consideration of the relationship, and the accuracy of the angle detection can be improved.

[ example 2]

Example 2 is a specific example in which the number of times of inner diameter deformation is changed from 4 to 6 with respect to fig. 5 (example 1), and fig. 6 is a front view of the example.

In example 2, the number of excitation times is 2, the shaft double angle is 5, the number of resolver teeth is 8, and the number of inner diameter deformation times is 6, and fig. 6 illustrates resolver caulking (caulking)

portions

12a, 12b, 12c, 12d, 12e, 12f, and

resolver protrusions

13a, 13b, 13c, 13d, 13e, 13 f.

This embodiment 2 also produces the same effects as embodiment 1 by using the same basis as embodiment 1.

[ example 3]

In example 3, the number of times of excitation is changed from 2 to 5, the axial multiple angle is changed from 5 to 4, the number of resolver teeth is changed from 8 to 10, and the number of times of inner diameter deformation is set to 3, respectively, as compared with fig. 5 (example 1), and fig. 7 is a front view of an example.

In example 3, a specific configuration example is shown in which the number of times of excitation is 5, the shaft double angle is 4, the number of resolver teeth is 10, and the number of times of inner diameter deformation is 3, and in fig. 7, resolver caulking (caulking)

portions

12a, 12b, 12c, and

resolver protrusions

13a, 13b, 13c are shown as an example.

This embodiment 3 also produces the same effects as embodiment 1 by using the same basis as embodiment 1.

[ example 4]

Example 4 is a specific example in which the number of times of inner diameter deformation is changed from 3 to 5 with respect to fig. 7 (example 3), and is illustrated in a front view in fig. 8.

Example 4 is a specific configuration example when the number of times of excitation is 5, the shaft double angle is 4, the number of resolver teeth is 10, and the number of times of inner diameter deformation is 5, and fig. 8 illustrates resolver caulking (caulking)

portions

12a, 12b, 12c, 12d, 12e, and

resolver protrusions

13a, 13b, 13c, 13d, 13 e.

This embodiment 4 also produces the same effects as embodiment 1 by using the same basis as embodiment 1.

[ example 5]

In example 5, the number of times of excitation is changed from 5 to 3, the number of resolver teeth is changed from 10 to 12, and the number of times of inner diameter deformation is set to 7, respectively, as compared with fig. 7 (example 3), and fig. 9 is a front view of an example.

Example 5 is a specific configuration example when the number of times of excitation is 3, the shaft double angle is 4, the number of resolver teeth is 12, and the number of times of inner diameter deformation is 7, and fig. 9 illustrates resolver caulking (caulking)

portions

12a, 12b, 12c, 12d, 12e, 12f, 12g, and

resolver protrusions

13a, 13b, 13c, 13d, 13e, 13f, 13 g.

This embodiment 5 also produces the same effects as embodiment 1 by using the same basis as embodiment 1.

[ example 6]

Example 6 is a specific example in which the number of times of inner diameter deformation is changed from 7 to 9 with respect to fig. 9 (example 5), and fig. 9 is a front view of the example.

Example 6 is a specific configuration example when the number of times of excitation is 3, the shaft double angle is 4, the number of resolver teeth is 12, and the number of times of inner diameter deformation is 9, and fig. 10 illustrates resolver caulking (caulking)

portions

12a, 12b, 12c, 12d, 12e, 12f, 12g, 12h, 12i, and

resolver protrusions

13a, 13b, 13c, 13d, 13e, 13f, 13g, 13h, 13 i.

This embodiment 6 also produces the same effects as embodiment 1 by using the same basis as embodiment 1.

Embodiment 2.

Embodiment 2 will be described with reference to fig. 6. In embodiment 2, the rotating electrical machine 100 is an 8-pole 12-slot brushless type, and is an example of a case where 4 projections are provided on the outer periphery of the resolver rotor 2 of the resolver device 1, and the axial multiple angle is 4.

As shown in the drawing, the resolver stator 3 of the resolver device 1 includes 10

resolver teeth

3T, and 3 coils in total of an excitation coil 10e (see fig. 4A), a sin coil 10s (see fig. 4A) as a resolver output coil, and a cos coil 10c (see fig. 4A) as a resolver output coil are wound around the resolver teeth 3T.

The resolver device 1 is housed in a resolver device housing portion 100Hh formed in a casing 100H of the rotating electric machine 100. The resolver stator 3 of the resolver device 1 is surrounded by the inner circumferential surface 100Hhwis of the housing wall portion 100Hhw of the resolver device housing portion 100 Hh.

In embodiment 2, the resolver winding end 6, the resolver terminal 7, and the resolver terminal block 8 illustrated in embodiment 1 are not illustrated.

In embodiment 2, the number of times of excitation is 5, the shaft angle is 4, and the number of resolver teeth is 10, so that the number of times of inner diameter change can be 3 using the above relationship. Therefore, the number of the portions for fixing the resolver device 1 to the resolver device mounting portion (the resolver device housing portion 100Hh) is set to 3, and 3 protrusions 100Hhwp having the same shape are provided at equal intervals on one side of the resolver device mounting portion (the resolver device housing portion 100 Hh).

When the resolver device 1 is pushed into the resolver device housing portion 100Hh of the casing 100H of the rotating electric machine 100, the resolver stator 3 may be deformed in the inner diameter direction by the projection 100Hhwp, but the deformation is unlikely to cause an error in the detected angle information as described in embodiment 1.

Further, the outer peripheral surface not in close contact with the projection 100Hhwp of the resolver stator 3 is formed with a slight gap 100Hhwg, so that the stator 3 itself is not in contact with the inner peripheral surface 100Hhwis of the housing wall portion 100Hhw of the resolver device housing portion 100Hh, thereby ensuring alignment.

Embodiment 3.

Embodiment 3 will be described with reference to fig. 7. In embodiment 3, the rotating electrical machine 100 is a 10-pole, 12-slot brushless type, and is an example of a case where 5 projections are provided on the outer periphery of the resolver rotor 2 of the resolver device 1, and the axial multiple angle is 5.

As shown in the drawing, 8 resolver teeth 3T are provided in the resolver stator 3 of the

resolver device

1, and 3 coils in total are wound around the resolver teeth 3T, namely, an excitation coil 10e (see fig. 4A), a sin coil 10s (see fig. 4A) as a resolver output coil, and a cos coil 10c (see fig. 4A) as a resolver output coil.

The resolver device 1 is housed in a resolver device housing portion 100Hh formed in a casing 100H of the rotating electric machine 100, and

flanges

14a, 14b, 14c, and 14d provided on the outer periphery of the resolver stator 3 are fixed to the casing 100H by screw locking.

In embodiment 3, the number of times of excitation is 2, the shaft angle is 5, and the number of resolver teeth is 8, so that the number of times of inner diameter change can be 4 according to the relational expression. Therefore,

flanges

14a, 14b, 14c, and 14d are provided on the outer periphery of the resolver stator 3, and the resolver device 1 is fixed to the resolver device mounting portion (resolver device housing portion 100Hh) with 4 screws.

At this time, the resolver stator 3 may be deformed by the screw locking, but as described in embodiment 1, the deformation is unlikely to cause an error in the detected angle information.

In embodiment 3, when an angular error occurs due to a displacement in the mounting position of the resolver device, the angular error can be corrected by removing and reassembling the screw.

As described above, the number of times of inner diameter deformation is determined taking into consideration the number of times of output windings determined by the number of times of excitation, the shaft double angle, and the number of teeth, and the number of fixed portions of the resolver device can be determined, and therefore, the accuracy of detecting the angle can be improved. Further, as a structure for fixing the resolver stator, not only a flange, a caulking, or the like is applied to the resolver stator itself, but also a resolver stator pressure is applied by the projection of the housing wall of the housing portion for the resolver device being in close contact with the resolver stator side, and the angle detection accuracy can be improved by the number of the fixing portions selected.

In the drawings, the same reference numerals denote the same or corresponding parts.

While various exemplary embodiments and examples are described herein, the various features, aspects, and functions described in one or more embodiments are not limited in their application to a particular embodiment, but may be applied to embodiments alone or in various combinations.

Therefore, countless modifications not shown by way of example can be conceived within the technical scope disclosed in the present application. For example, it is assumed that the case where at least one component is modified, added, or omitted, and the case where at least one component is extracted and combined with the components of other embodiments are included.

Description of the reference symbols

1 Rotary transformer device

2 rotary transformer rotor

3 rotary transformer stator

3T rotary transformer tooth part

Tooth center line of 3Tc rotary transformer

4-rotary transformer spool

5 rotating transformer winding

6 rotary transformer winding end

7 terminal of rotary transformer

8 rotary transformer terminal table

9 rotary transformer air gap

10e field winding

10s sin winding

10c cos winding

11c cos waveform

11e excitation waveform

11s sin waveform

12a, 12b, 12c, 12d, 12e, 12f, 12g, 12h, 12i resolver caulking (caulking) parts

13a, 13b, 13c, 13d, 13e, 13f, 12g, 13h, 13i resolver projection

14a, 14b, 14c, 14d flange

100 rotating electric machine

Housing of 100H rotating electric machine

100Hh housing for rotary transformer device (mounting part of rotary transformer device)

Storage wall part of 100Hhw storage part

100Hhwg gap

Inner circumferential surface of 100Hhwis storage wall portion

100Hhwp protrusions

Rotor of 100R rotating electric machine

Rotating shaft of 100Rs rotating motor

Stator of 100S rotating electric machine

100Sc rotating electrical machine stator coils.

Claims

1. A rotary transformer apparatus comprising: a resolver stator having a resolver tooth portion around which an excitation winding and an output winding are wound; and a resolver rotor that is surrounded by the resolver stator and rotates via a rotation shaft, the resolver stator being fixed to a resolver device mounting portion at two or more places, the resolver device being characterized in that,

2. The resolver arrangement according to claim 1,

the resolver stator is fixed to the resolver device mounting portion by a protrusion portion of the resolver rotor partially protruding to one side of the resolver device mounting portion.

3. The resolver arrangement according to claim 1,

the resolver stator is fixed to the resolver device mounting portion by a protrusion of which the resolver device mounting portion partially protrudes to one side of the resolver rotor.

4. The resolver arrangement according to claim 1,

a flange provided on the outer periphery of the resolver rotor is fixed to the resolver device mounting portion by a screw, thereby fixing the resolver stator to the resolver device mounting portion.

5. The resolver arrangement according to any one of claims 1 to 4,

the two or more fixed portions of the resolver stator are equally spaced in the circumferential direction.

6. The resolver arrangement according to any one of claims 1 to 5,

at least one of the fixing portions of the resolver stator is located on a center line of a resolver tooth of the resolver stator.

7. A rotary electric machine with a resolver device, comprising: a housing; a stator built in the housing; and a rotor built in the casing, the casing mounting the resolver device according to any one of claims 1 to 6, the resolver-equipped electric rotating machine being characterized in that,

the resolver rotor is rotated by rotation of the rotor.